<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				margin: 0;
				padding: 0;
			}
			#cir{
				width: 300px;
				height: 300px;
				background: coral;
				border-radius: 50%;
				margin: 20px auto 0;
			}
		</style>
	</head>
	<body>
		<div id="cir"></div>
	</body>
</html>